Don't Let Crabgrass Make You Crabby
You have to hand it to crabgrass. The pesky weed certainly knows how to take advantage of an opportunity. Healthy grass guards itself against weeds. But, when grass becomes distressed, take for instance by the summer heat, crabgrass wastes no time moving right in to bare spots.
Crabgrass thrives in conditions that turf grass cannot tolerate—hot, compacted, or poor soil. It especially loves the warm edges of sidewalks and pavement, and will quickly take advantage of any bare patches in your lawn.
What to do? Feeding, over seeding, and aerating your lawn this fall is key to preventing crabgrass next summer. Crabgrass seeds require plenty of light to germinate and will not be able to compete with your well-established, healthy turf.
For those hot spots near pavement, try using a heat-tolerant ground cover or crushed stone.
The PRFCT way to curb its spread is to take away its opportunity.
Start in the summer by getting rid of crabgrass before it goes to seed. Remove small patches with boiling water or by pulling it out at the root. Alternatively, there are toxin-free, vinegar-based products available in stores.
Corn gluten is often recommended as an organic crabgrass pre-emergent, but studies on its effectiveness have been mixed. Precise timing is key to its success. Since corn gluten is an expensive treatment that can be hard to get right, we generally do not recommend it.
These strategies will hold you over until the fall when it is time to take steps to prevent crabgrass from returning.